8  He made a huge contribution to 9 revolving clinic cupboards' contents (7)

 9  Madame Butterfly maybe managed without Edward (5)

11 Serve on a jury that's oddly shifty (3)

13 With respect to northern cathedral city, some banks went ahead without any fuss or bother (8)

17 The eminent, nay, incredible timing for 16 & 21's 1A 4A (10,3)

18 Searches male cabins outside of November (8)

20 A quiet tree (3)

23 Mother of 21 naiad characters (5)

26 Rolls has gold on it for the 1A 4A venue (7)

27 Calling for 16 to react differently on second Sunday (7)

28 Devotion comes from compassion without the first little bit of envy (5)

 1  Prose rewritten in lines (5)

 2  Unusually chatty after time ran out for Britannia, perhaps (5)

 3  Put back switch (4)

 4  You and I have bash like 16's 4A in tone, maybe? (5)

 5  Couple make united entry (3)

 6  Diamonds are lovely, but not new (3)

 7  Seriously missing the Spanish sauce! (5)

10 Essential to slip on choir cloak (6)

12 Island is bringing in zealous administrative leaders (5)

13 Glow witnessed around hospital (5)

14 Ooo! 17 will see them being exchanged (5)

15 Increases resulting from another lapse (5)

16 21's intended me to hang around (6)

18 TV and newspapers maybe blame diary extract (5)

19 Directions leading to settlements (5)

20 16 & 21 will soon go down this as beer is found inside (5)

21 Pester the bachelor prince... but not for much longer! (5)

22 Swings around to get a photo (4)

24 An exercise that's suitable (3)

25 Either uttered admiration (3)